Self Study Program 307 – The Touran Electrical system

VAG SSP 307. This self-study programme is designed to help you better understand the networking concept of the Volkswagen Touran. The networking technology, used until now only in luxury class vehicles, will be a feature in compact vans, such as the Volkswagen Touran.

The control units installed in this system also manage tasks that were previously carried out by relays and switches. In order that these tasks can be fulfilled efficiently, the units have to exchange a great deal of information (data) between each other. Such a high rate of data transfer would only be possible with a large number of cables if standard means were used, such as wiring  connections.

To keep the number of wiring connections at a manageable level, Volkswagen favours the use of data bus connections on a wider scale.

It covers the allocation of control units to the various data bus systems, the fitting locations of relay slots, fuses and control units. Furthermore, it describes the various functions of and changes to the diagnosis system.


  • Introduction
  • LIN data bus
  • Onboard power supply
  • Data bus diagnosis interface
  • Onboard power supply control unit
  • Windscreen wiper system
  • Rear window wiper system
  • Dash panel insert
  • Immobiliser
  • Convenience and infotainment settings
  • Lighting
  • Service
  • Test yourself

This self-study programme explains the design and function of new developments. The contents will not be updated. For the latest testing, setting and repair instructions, please refer to the relevant workshop literature.

Language: English
Format: PDF
Pages: 60

Self Study Program 307 – The Touran Electrical system Design and function PDF free online